Quote:
Originally Posted by Wavytone
12V inverter to power laptop,
SLA battery + charger from www.batteryworld.com.au
Female car cigarette lighter sockets, inline fuse, wiring and assorted crimp lugs also available.
Or buy the parts from Jaycar and build a DIY power distribution board.
Work out what the peak power draw of your mount, inverter and heaters amount to; the battery must be able to supply that as a peak current.
The second question is how many amp-hours are needed overall (ie on average) (amps x hours, understand ?). This is less than the peak current but I'd multiply by 8 to 12h to make sure it has plenty of capacity.
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12V to 110 V are quite inefficient. You are converting 12V to house voltage and then typically the laptop adapter is coverthign back to 19V which is what many of the laptop adapters provide to the computer. Better to go from 12V DC to 19V DC directly using a car adapter for your laptop.
These Lithium Jumper packs can be a good choice. They pack a lot of capacity into a small package
https://www.amazon.com/s/ref=nb_sb_s...=2TZRNN12M6VZ3
These can handle high amperage bursts to start cars but the load we put on them is very low and steady. The number you want to look at is the mAH ratngs. This is a capacity number. The higher the mAH rating or AH rating the more capacity the pack has to run your equipment.
I am in the USA so I am showing USA sources. Naturally you will look for local sources.
As far as power distribution well that depends on what kind of power you need and what kind of connectors they use. If they have USB connectors you can plug them into the laptop USB ports. Or many of the car jumpers have USB ports. Some of these can output 19V directly and may be able to power your laptop directly if you have the right kind of cable?
Likewise if you have the larger 12V accesory plug then you can get multiport adapters for those.